Improvement in steam-generators



TRUMAN MERRl-A'M.

Improvement in Steam Generators.

a/i/Ll Patented March 26,1872.

L. JENTER.

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UNITED STATES PATENT OFFICE.

TRUMAN MERRIAM, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO HIMSELF AND J. B. SMITH, OF SAME PLACE.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of Letters Patent No. 125,068, dated March '26, 1872 antedated March 19, 1872.

To all whom it may concern:

Be it known that I, TRUMAN MERRIAM, of the city and county of Milwaukee and State ofWisconsin, have invented a new and useful Improvement in Steam-Generators; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanyin g drawing forming part of this specification, in which- Figure 1 is a front-end view of my invention; Fig. 2, a rear-end View; Fig. 3, a crosssectional view; Fig. 4, a longitudinal sectional view; Fig. 5, a view of the feed-water regulator; and Fig. 6, a view of the feed-pump.

Similar letters of reference in each of the figures indicate corresponding parts.

The object of my invention is to provide a steam-generator cheaply constructed, easy of management, and economical in use.

A is the outside covering of the generator; 13, front air-chamber O, the coal-feeding reservoir; l), the draught-door to supply air to the fire when the fan is not in operation; E, air-pipe through which air is driven into the fire by a fan; F, opening through which the exhaust steam is conveyed to the exhaustchamber; Gr, water-pipe through which water is conveyed to the heater and above the exhaust steam, so that its trickling through holes in the pipe G onto the steam shall condense the steam and heat the water also; H, waterpipe to convey the water to pipe G, and through the enlarged part of which pipe G turns; and there is a hole in pipe G, which when opposite the pipe H receives water, but when turned away shuts off the water, and no water will run to the feed-water reservoir. I is the feedwater wheel or regulator; K, a weight hung on the regulator-wheel to balance it, so that when the wheel is empty of water it will keep that side of the wheel which it is hung on down, but when the wheel is filled with water it will turn up the weight; L, water-passage in the wheel for the water when it is high in the boiler to run into the wheel, and when it is low to run back again; M, a pipe leading from the ,water-pipe g to the grate; N, cock in pipe M, the handle of which is fastened to one of the arms of the regulator-wheel I, which, when the water reaches a dangerous point, turns cock N and opens it, when the water and steam will be thrown into the fire and put it out; 0 O, a bar through pipe G and connections to wheel I, which, as the wheel turns, turns the pipe either way, and either lets on or turns off the water; P, feed-pump; Q, pipe from the exhaust-steam passage round the outside of the feed-water reservoir to convey to the pump the water condensed from the exhaust steam; R, pipe from the feed-water reservoir to the pump; S, a hole in the pump to let in air to be thrown into the generator; T, water-pipe from the pump to the generator,'by which the generator is supplied with water; U, a water-drum; V, a steam-drum; W, a steam-drum; X, water-pipes, one end of which enters water-drum U, and the other entering steam-drum V. These pipes are calculated to coil round twice and a half in their way from drum to drum, but in the drawing go round but once and a half. They lie close together sidewise, making a tight fire-and-smoke reservoir; and a pipe of same size at each end shut-s up this fire-passage, as seen in Fig. 4. These pipes are calculated to be about two inches in diameter on the outside, which would make a fire-and-smoke passage, as shown in the drawing, of ten inches by two inches, but can be of any size to suit. Y, steam-pipes from drum V to drum W; (the steam is to be taken out of drum W' for use;) Z, hollow firegrate, with small air-holes to feed the fire.

The air is forced in through the door by means of pipe E, and enters the front end of the grates, passing along in the grates, feeding the fire from the bottoiflot the grate, and from the grate above the fire supplies air to burn the gases which rise from the coal; and also the air in the grate-bars. which are hollow their whole length, passes through t into the back end and out, as shown by the arrows in Fig. 4, to supply air to the gases as they rise from the coal. a, passage for the exhaust steam; b, the feed-water reservoir, the water falling in one side, and passing over the end on the other side a little lower than the rest of the reservoir, to be filled with hay or straw to collect the lime and sediment in the water, and prevent its being thrown into the boiler; a, passage to the smoke-stack for the escape of what steam may not be condensed in its passage round the boiler; d, smoke-stack; e, ashpit; f, passage in the grate for the passage of the air blown in through air-pipe E; g, pipe which passes through wheel I, and enters water-drum U; it h, slides to close the feed reservoir for coal; 1', air'holes through the back end of the fire-box; k, piston-rod to the feedpump; 1, piston to the feed-pump. This feedpump may be worked by the main engine; or a donkey-engine can be attached to this pump, so that it can be worked when the main engine is lying still. at m, valves in the pipe from the pump to the generator; at, a blow-01f cock to blow the mud or sediment out of the generator, and also for blowing out the ashes and soot from the draught-space 0, framework under the generator.

- Operation.

Fill the drum U and pipes X with water, put coal on the grate-bars Z, and light a fire; leave draught D open, and disconnect pipe E, leaving the hole open for the air to be drawn in through the grates. When the fire gets well under Way, close the draught-door D and let the air necessary to supply the fire pass through the'door and grates. When the steam is up, connect pipe E and start the engine; let on water from a tank'through pipe H, and as the steam is exhausted inside the shell the water trickling through pipe G will condense a considerable portion of it, and the water will fall into the feed-reservoir, and the water from the feed-reservoir and from the exhaust steam will supply the pump P and be pumped into the generator, the air-hole S supplying air to fill up the pump what the water may lack, and thus give power from the air which is pumped into the boiler. As the water rises in the generator it will pass into the regulator-wheel and make the top too heavy for the weight, when the wheel will turn and when the water gets too high in the generator, it will turn pipe G and shut off the water from supplying the feed-water heater; and when the water gets down to the proper point in the generator, pipe G will be turned and water will be let on again. When the water gets too low in the generator, or at a dangerous point, the pin N in the wheel I strikes cock M and floods out the fire.

To feed coal to the fire, open the outer slide it in reservoir 0. and fill in coal between the two slides, and shut slide h and open slide h, and let the coal fall into the fire-chamber, and thus avoid opening the door to let in cold air. To regulate the fire, a poker through a small hole in the door can be used. In this way a short smoke-stack just long enough to carry the smoke out ofa building will be long enough, for the draught is all created by the fan.

Claims.

I claim as my invention 1. A steam-generator, when constructed with parts U, V, W, X, and Y, in combination with shell A, substantially as described.

2. Water-pipe G and exhaust-opening F, in combination with the steam-generator V, W, X, and Y, substantially as described.

3. Feed-water reservoir 1), in combination with steam-generator V, W, X, and Y, substantially as described.

4. Steam-chamber a, passage e, and smokestack 01, in combination with steam-generator V, V, X, and Y, substantially as described.

5. A steam-generator consisting of tubes U, V, V, X, and Y, substantially as described.-

6. Pump P, with its pipes Q and R, and airhole S, with pipe '1, in connection with a steamgenerator, substantially as described.

7. Feed-water regulator I, with its weight K, in combination with steam-generator V, W, X, and Y, substantially as described.

8. Hollow grates Z, with blow-pipe E, in combination with steam-generator V, W, X, and Y, substantially as described.

9. Regulator I, pin N, and cook and pipe M, in combination with steam-generator V, W, X, and Y, substantially as described.

TRUMAN MERRIAM.

Witnesses:

J. B. SMfTH, W. M. HORNOR. 

